Bramble gall

Bramble galls are growths on plants caused by Gall Wasps. There are lots of different types and each makes its gall in a particular type of plant, in this case the stem of a bramble. A female Gall Wasp injects her eggs into a plant with an ‘ovipositor’, which looks like a sharp needle. It’s thought that special chemicals injected by Gall Wasps make the plant grow differently, forming a gall. The gall is a safe home as well as a source of food for the babies.